CN101346936B - Address managing method and communication device - Google Patents
Address managing method and communication device Download PDFInfo
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- CN101346936B CN101346936B CN2006800490856A CN200680049085A CN101346936B CN 101346936 B CN101346936 B CN 101346936B CN 2006800490856 A CN2006800490856 A CN 2006800490856A CN 200680049085 A CN200680049085 A CN 200680049085A CN 101346936 B CN101346936 B CN 101346936B
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- 238000004891 communication Methods 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title description 4
- 230000005540 biological transmission Effects 0.000 claims abstract description 65
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 238000007726 management method Methods 0.000 claims description 18
- 238000010200 validation analysis Methods 0.000 claims description 14
- 238000012423 maintenance Methods 0.000 claims description 4
- 230000000052 comparative effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 8
- 239000003999 initiator Substances 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 230000019771 cognition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2803—Home automation networks
- H04L12/2816—Controlling appliance services of a home automation network by calling their functionalities
- H04L12/282—Controlling appliance services of a home automation network by calling their functionalities based on user interaction within the home
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2803—Home automation networks
- H04L12/2816—Controlling appliance services of a home automation network by calling their functionalities
- H04L12/2821—Avoiding conflicts related to the use of home appliances
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5038—Address allocation for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2803—Home automation networks
- H04L2012/2847—Home automation networks characterised by the type of home appliance used
- H04L2012/2849—Audio/video appliances
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2101/00—Indexing scheme associated with group H04L61/00
- H04L2101/60—Types of network addresses
- H04L2101/618—Details of network addresses
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Automation & Control Theory (AREA)
- Computer Security & Cryptography (AREA)
- Human Computer Interaction (AREA)
- Small-Scale Networks (AREA)
Abstract
A communication device (100), which is connected to a one-way data connection and to a network over which messages are bidirectionally transmitted and received, comprises a one-way data connection status detecting part (101) for detecting a connection-validating request, which is outputted from a communication device at a data receiving end and indicates that a one-way data connection can be used to transmit data to the communication device at the data receiving end, and for detecting a connection-invalidating request which is outputted from the communication device at the data receiving end and indicates that the one-way data connection cannot be used to transmit data to the communication device at the data receiving end; a local-device address acquiring part (102) for acquiring a local-device address from a message via the network upon a detection of a change from the connection-invalidating request to the connection-validating request; an address holding part (104) for holding the local-device address; and a message transmission continuing part (105) for responding, based on the local-device address held by the address holding part (104), to the message received via the network independently of whether the connection-invalidating request is detected or not.
Description
Technical field
The present invention relates to address management method and communication equipment, relate in particular to communication equipment and connect, and message is the address management method in the address of using when communicating by letter with the communication equipment on the networks such as home entertainment network of transmitted in both directions between communication equipment with one-way data.
Background technology
In recent years, realized that gradually the digital device in the family interconnects, the user can appreciate the in-home network of various contents with high image quality, high tone quality.For example, HDMI (the High-Definition Multimedia Interface: HDMI (High Definition Multimedia Interface)) just can transmit image, sound and control signal, digitized video, sound input/output interface standard (for example with reference to non-patent literature 1) that formulates in December, 2002 towards AV equipment of new generation with a cable.The HDMI standard is as obtaining cognition to the numeral output of AV equipment such as the DVD player of Digital Television or STB.And the HDMI standard has also stipulated to be used to make agreement CEC (the Consumer Electronics Control: consumer electronics control) of control signal transmitted in both directions.If by utilizing the CEC agreement to make equipment relay and control signal, then can control a plurality of AV equipment with a remote controller.That is, by making control signal transmitted in both directions between television set, AV amplifier and DVD player, thereby can operate whole home theater with a remote controller.
Below, the address distribution method that equipment room is discerned mutually in the network that is used in the CEC agreement is described.Recognition of devices in the CEC agreement and connecting and composing in the identification, at first utilize the DDC that connects as one-way data (Display Data Channel: bus DDC), come mapped physical address.Physical address is meant the identiflication number that uses 16 bit value, and this 16 bit is to be divided for four groups by per 4 bits, is four groups as the array with 10 carries of " 0.0.0.0 " etc. this from 0 to 15 and shows.DDC is VESA (the Video Electronics Standards Association: the standard video frequency electronic standard association) that is defined as pass on function such as display machine information for the connection that realizes display and regeneration and to connected equipment.The machine information of display etc. are as EDID (Enhanced Extended Display Identification Data: expanded display recognition data) be stored in RAM or the rewritable nonvolatile memory etc., and in that (HotPlug Detect Signal: the hot plug input) Biao Shi conduct is used to make one-way data to connect effectively to trigger reads permission when being expressed, and reads EDID via the DDC bus from connected equipment by HPD.
Fig. 1 is that of in-home network constitutes exemplary plot.In-home network 1 comprises: television set 10, AV amplifier 20 and DVD player 30.In-home network is with tree-shaped star-like connection, and each device utilizes the DDC bus to be assigned with physical address.
At this, looking all equipment is "on" position.The television set 10 that does not have the HDMI output port is to hold " 0.0.0.0 " (10PA_0) equipment of physical address as root device.
The AV amplifier 20 that the HDMI output port 20PO_1 that is connected with the HDMI input port 10PI_1 of television set 10 is connected can show by the permission according to the HPD of television set 10, read the EDID of television set 10, and know the physical address that is assigned with for " 1.0.0.0 " (20PA_0).
The DVD player 30 that the HDMI output port 30PO_1 that is connected with the HDMI input port 20PI_1 of AV amplifier 20 is connected can show by the permission according to the HPD of AV amplifier 20, read the EDID of AV amplifier 20, and know the physical address that is assigned with for " 1.1.0.0 " (30PA_0).
According to the above, after the equipment on the network has been assigned with the physical address that topology that reflection connects with one-way data transmits, utilize CEC bus as two-way connection, the logical address of two-way communication that is used for each equipment room is mapped.Logical address is meant the ID of define equipment kind.Fig. 2 is the schematic diagram of definition of the logical address of CEC agreement defined.
After television set 10, AV amplifier 20 and DVD player 30 have been assigned with described physical address, begin to obtain the pairing logical address of device category of self.The acquisition of logical address is by＜Polling Message〉transmission realize, should＜Polling Message be one of CEC message that is transmitted with the CEC control signal.
Fig. 3 is the structure chart of the frame of CEC message.CEC message has the basic frame structure that is called as block, and has more than one block.Usually have the EOM and the ACK territory of 1 bit among per 1 block, which block can similarly be used.In addition, the using method of the information of 8 bits in the block is different because of the difference of message content, and the initial block of message is the frame that is called as header block.
Fig. 4 is the frame assumption diagram of the header block of CEC message.Be used for＜PollingMessage〉CEC message only constitute by header block.Header block is made of the initiator territory (Field_1) of 4 bits, the destination territory (Field_2) of 4 bits, the EOM territory (Field_3) of 1 bit and the ACK territory (Field_4) of 1 bit.The below definition in each territory of explanation.
The logical address of message transmitting apparatus has been set in initiator territory (Field_1) by the message transmitting apparatus.At＜Polling Message〉situation under, determine the logical address of equipment of itself, and set＜Polling Message〉logical address values that goes for of transmitting apparatus.
The logical address of message sink equipment has been set in destination territory (Field_2) by the message transmitting apparatus.Therefore, at＜Polling Message〉situation under owing to inquire after whether the equipment of replying that conforms to is arranged, therefore set＜Polling Message〉logical address values that goes for of transmitting apparatus.
EOM territory (Field_3) has been set whether should further continue to transmit block by the message transmitting apparatus.If being 0, this territory continues block, if 1 is finished with this block.Therefore, at＜Polling Message〉situation under owing to only constituted message, therefore be set at 1 with header block.
ACK territory (Field_4) by the message sink apparatus settings whether meet the recipient of message or refuse information not, with replying as message.Be 15 in recipient's value (=Broadcast) under in addition the situation of value, be 1 o'clock in this territory, then for not meeting, refusing, be 0 o'clock, then for meeting, accepting in this territory.(under=Broadcast) the situation, being 0 o'clock in this territory, then for not meeting, refusing, is 1 o'clock in this territory, then for meeting, accepting to be 15 in recipient's value.At＜Polling Message〉situation under, set the logical address that the message transmitting apparatus goes in the destination territory, equipment on the network is read the destination territory, is to send to equipment of itself if be judged as, and then returns to meet, accept (ACK=0).Therefore, the message transmitting apparatus can detect the equipment of holding the logical address that goes for and be present on the network when returning ACK=0.At this, on the CEC control signal wire that each bit connects in each equipment by relaying, set high (ACK=1) for ACK bit message transmitting apparatus, needing only in the equipment on the network has the CEC holding wire of an equipment to drop to low (ACK=0) from high (ACK=1), just is set to meet, accept (ACK=0).
Fig. 5 is an exemplary plot of transmission CEC condition of information, show AV amplifier 20 obtain " Audio System " (=5,0b0101) with the time, transmission＜PollingMessage as logical address〉state.When these 9 bits of AV amplifier 20 transmission 0b010101011, all devices that has received on the network of this 9 bit is read the destination territory, and judges whether to issuing equipment of itself.If before equipment of itself obtains logical address, then do not meet, refuse replying of (ACK=1).For example, when before DVD player 30 obtains logical addresses, going for logical address as if AV amplifier 20, the ACK that DVD player 30 is set as this 1 bit of the 0b1 that replys that does not meet, refuses.And, when equipment of itself has obtained after the logical address, if not when issuing equipment of itself, do not meet, refuse replying of (ACK=1).For example, after television set 10 obtains logical addresses, the logical address of television set 10 be " TV " (=0,0b000), for not meeting, refusing.Therefore, television set 10 settings are as the ACK of this 1 bit of 0b1 that does not meet, refuses.
Equally, DVD player 30 is by＜Polling Message〉transmission obtain " DVD1 " (=4,0b0100), with as logical address.
Exist in the equipment on network under many situations corresponding to the equipment of same device category, to transmission after this request obtain same device category＜Polling Message equipment, return the equipment that obtains same device category at this＜Polling Message meet, accept (ACK=0), received and met, the equipment of accepting (ACK=0) is in order to obtain logical address in addition, and the logical address that goes for of change once more, and transmission＜Polling Message 〉, because this structure is not an emphasis point of the present invention, so detailed.
According to the above, after obtaining physical address and logical address, utilize the CEC bus of two-way connection, for the two-way communication to each equipment room is controlled, represent that therefore the report notice of the corresponding relation of physical address and logical address is issued by each equipment.Report notice with as one of CEC message＜Report Physical Address transmission realize.
Fig. 6 is an exemplary plot of transmission CEC condition of information, shows AV amplifier 20 transmission＜Report Physical Address〉state.
＜Report Physical Address〉message constitutes with header block and four data block, is Broadcast message.Therefore, AV amplifier 20 is transmitted in the initiator territory of header block, set " Audio System " (=5, (=Broadcast) the header block that 0b0101), sets 15 in the destination territory.When the signal of these 9 bits of AV amplifier 20 transmission 0b010111110, all devices that received on the network of this 9 bit are read the destination territory, and to be judged as be Broadcast message, meet, accept replying of (ACK=1).Then, AV amplifier 20 carries out the transmission of data block.In data block, comprised the physical address (" 1.0.0.0 ") of AV amplifier 20 etc., because message content is not emphasis point of the present invention so detailed in detail.Owing to comprised physical address among the data block, so the corresponding relation of the logical address in initiator territory and physical address is notified also.At this, 30 couples of each block of television set 10 and DVD player set the ACK as this 1 bit of the 0b1 that replys that meets, accepts.
Equally, DVD player 30 is with " DVD1 " (=4,0b0100) be set to the initiator territory of header block, with 15 (=Broadcast) be set to the destination territory, and will comprise physical address=" 1.1.0.0 "＜Report Physical Address transmission of messages is to data block.
Like this, obtain the physical address and the logical address of equipment of itself, after the corresponding relation of the physical address of all devices on the network being reported equipment of itself and logical address, utilize the CEC bus of two-way connection, carry out specifying to logical address, and also carry out the two-way communication of each equipment room sometimes simultaneously by the equipment of physical address.
Non-patent literature 1High-Definition Multimedia InterfaceSpecification Version 1.2
Yet, in non-patent literature 1, about the mapping status of physical address and logical address, not regulation relevant shift as the permission that one-way data is connected effectively trigger according to HPD when disapproving (ineffective treatment), disapprove (invalid) during in the transmission of messages of carrying out with the CEC agreement.
Summary of the invention
In view of above background, the object of the present invention is to provide a kind of address management method and communication equipment, even connecting invalid or accepted one-way data, one-way data connects invalid notice, also can easily proceed the transmission of message by two-way connection.
To achieve the above object, communication equipment involved in the present invention is connected to one-way data and connects and network, described one-way data connects the communication equipment that is used for from data receiver and sends to the one-way data of data receiver's communication equipment, and abides by the HDMI (High Definition Multimedia Interface) standard; Described network is used for transmitted in both directions message, and abide by described HDMI (High Definition Multimedia Interface) standard, comprising of described communication equipment: one-way data connection state detection unit, detection is from the request of connection validation and the request of connection ineffective treatment of described data receiver's communication equipment output, the request of described connection validation is represented, utilize described one-way data to connect, can send data to described data receiver's communication equipment, the request of described connection ineffective treatment is represented, utilize described one-way data to connect, cannot send data described data receiver's communication equipment; The equipment of itself address obtains the unit, detecting from the request of described connection ineffective treatment when described connection validation request changes, by described network, obtains the equipment of itself address with message; The address holding unit keeps described equipment of itself address; And transmission of messages continuation unit, no matter whether the request of described connection ineffective treatment is detected, all reply making by the message of described network reception the described equipment of itself address that is kept according to described address holding unit.
In view of the above, communication equipment involved in the present invention keeps the address by the address holding unit, connect invalid notice even one-way data connects invalid or accepted one-way data, also the transmission of messages of two-way connection is easily proceeded in the address that can utilize the address holding unit to be kept.
And, also can be that described communication equipment further comprises: equipment of itself address notification message transmission unit, by message, described equipment of itself address notification is given other the communication equipment that is connected on the described network; Comparing unit obtains whether consistent comparing of described equipment of itself address that described equipment of itself address that the unit obtained and described address holding unit kept to described equipment of itself address; And the address notification transmission of messages skips the unit, controls under the situation according to the comparative result unanimity of described comparing unit, so that described equipment of itself address notification message transmission unit is not carried out the notice of described equipment of itself address.
In view of the above, do not have in the address under the situation of change (comparing unit is judged as under the consistent situation), the report notice of the corresponding relation by skipping presentation address can be simplified other the processing of communication equipment that is connected on communication equipment and the network.And in the transmission of carrying out complicated two-way news, the message that can reduce simultaneously from a plurality of communication equipments transmits quantity, thereby can avoid the conflict of message and crisscross.
And, the address of other communication equipment that is connected on the described network of the further maintenance of described address holding unit; No matter whether the request of described connection ineffective treatment be detected, described transmission of messages continues the unit and all utilizes transmission that the address of described equipment of itself address and described other communication equipment carries out message and reply.
In view of the above, because the communication equipment address of other that can utilize that the address holding unit kept comes message transfer, whether be the integral body that disarmed state can the Control Network system therefore no matter one-way data connects.
And the present invention not only can be used as such communication equipment and realizes, and, can also as the characteristic unit that will be had in the communication equipment as step, the address management method of employed mailing address is realized between communication equipment.
The present invention can provide a kind of address management method and communication equipment, connects invalid notice even one-way data connects invalid or accepted one-way data, also can easily proceed the transmission of message by two-way connection.
Description of drawings
Fig. 1 is the exemplary plot that network constitutes.
Fig. 2 shows the definition with the logical address of CEC agreement regulation.
Fig. 3 shows the frame structure of CEC message.
Fig. 4 is the frame assumption diagram of the header block of CEC message.
Fig. 5 is an exemplary plot of transmission CEC condition of information.
Fig. 6 is an exemplary plot of transmission CEC condition of information.
Fig. 7 is an exemplary plot of the related address administration state of present embodiment.
Fig. 8 is the formation exemplary plot of the related communication equipment of present embodiment.
Symbol description
1 in-home network
10 television sets
20 AV amplifiers
30 DVD player
100 communicators
101 one-way data connection status test sections
102 equipment of itself address acquisition portions
103 equipment of itself address notification transmission of messages portions
104 address maintaining parts
105 transmission of messages continuation portions
106 address notification transmission of messages are skipped portion
110 Department of Communication Forces
10PA, 10PA_0,10PA_1,20PA, 20PA_0,20PA_1,20PA_2,30PA, 30PA_0 physical address
10LA, 20LA, 30LA logical address
10PI_1,20PI_1,20PI_2 HDMI input port
20PO_1,30PO_1 HDMI output port
Embodiment
Below, the embodiment to address management method involved in the present invention is elaborated with reference to accompanying drawing.
Even the address management method in the present embodiment connects when invalid at one-way data, also can be by continuing to utilize physical address and the logical address that effectively the time, is obtained, and can easily continue the transmission of messages of two-way communication.Therefore, if physically connection is still continued, then can be with network system integral body as an assembly, and retentive control often and interlock.And connection physically can be that wired connection also can be wireless connections.
Fig. 7 is an exemplary plot of the related address administration state of present embodiment.Network in the present embodiment constitutes identical with Fig. 1, and television set 10, AV amplifier 20 and DVD player 30 connect for one-way data.And, be not have under the state of energising at television set 10, the power supply of looking AV amplifier 20 and DVD player 30 is the ON state.
At first, utilize Fig. 7 that the work address management method in the present embodiment, that one-way data is connected to when invalid is described.
The television set 10 that does not have the HDMI output port is root device, is to have physical address " 0.0.0.0 " (10PA) and logical address " TV " equipment (10LA).At first, television set 10 is by user's energized the time (step 10P_T1), and television set 10 makes HPD become effective status (making the HPD signal become high from low) (step 10HPD_T1).
When AV amplifier 20 becomes effective status at the HPD of television set 10, read the EDID of television set 10, and the physical address " 1.0.0.0 " that obtains equipment of itself (20PA) (step 20PA_A_T1).Afterwards, AV amplifier 20 is by transmission＜Polling Message 〉, the logical address " Audio System " of acquisition equipment of itself is (step 20LA_A_T1) (20LA).The AV amplifier is replied the CEC message that is transferred to this logical address having obtained logical address " Audio System " (20LA) time.
When DVD player 30 turns back to effective status at the HPD of AV amplifier 20, read the EDID of AV amplifier 20, and the physical address " 1.1.0.0 " that obtains equipment of itself (30PA) (step 30PA_A_T1).Afterwards, DVD player 30 is by transmission＜Polling Message 〉, thus the logical address " DVD1 " of acquisition equipment of itself (30LA) (step 30LA_A_T1).DVD player 30 is replied the CEC message that is transferred to this logical address obtaining logical address " DVD1 " (30LA) time.
For example, utilize the remote controller of television set 10 to send the indication (step 10P_T2) of deenergization this hypothesis user.In this case, television set 10 can be by transmission CEC message＜Standby〉(step 10M1), and make AV amplifier 20 and DVD player 30 become holding state (power supply OFF) simultaneously, with as the control that home theater integral body is carried out.When AV amplifier 20 and DVD player 30 became holding state, AV amplifier 20 made HPD become disarmed state (making the HPD signal become low from high) (step 20HPD_T2).Because CEC message＜Standby〉detailed content be not emphasis point of the present invention, so detailed.
Communication equipment AV amplifier 20 in the present embodiment even the HPD of television set 10 becomes disarmed state (the HPD signal becomes low from high) (step 10HPD_T2), also can keep the logical address (20LA) and the physical address (20PA) of equipment of itself.Equally, even the HPD of communicator DVD player 30 AV amplifiers 20 of the present invention becomes disarmed state, also can keep equipment of itself logical address (30LA) and physical address (30PA).And DVD player 30 keeps the logical address (20LA) and the physical address (20PA) of AV amplifier 20 too.
At this, the user utilizes the power turn-on of the remote controller of DVD player 30 with DVD player 30, and beginning reproducing contents (step 30_T1).In this case, for example by the user with the operation of the content of DVD player 30 regeneration as triggering, at first, by making CEC message＜User ControlPressed〉be transferred to the television set 10 (step 30M1) that becomes holding state from DVD player 30, thus make the power supply of television set 10 become conducting state.Then, by DVD player 30 with CEC message＜User Control Pressed be transferred to the AV amplifier 20 (step 30M2) that is in holding state, thereby make the power supply of AV amplifier 20 become conducting state.At this, about CEC message＜User Control Pressed〉detailed content owing to be not emphasis point of the present invention, so detailed, but, by control code " Power " is assigned to message, thus can the specified power supply conducting state.
According to CEC message＜User Control Pressed from DVD player 30〉state variation can be by the realization of sending of the logical address (20LA) that kept to AV amplifier 20.Therefore, the employed communication equipment of address management method in the present embodiment is compared to the address contents that comprises in the destination territory that comprises in this CEC message and the equipment of itself address of maintenance, owing to can be to make to the CEC message of equipment of itself replying to being judged as, whether be invalid influence, accept the control of network system integral body if not connected by one-way data.That is,, also can easily proceed the transmission of messages of two-way connection even the unidirectional connection of address management method is invalid in the present embodiment.
And the employed communication equipment of the address management method in the present embodiment can utilize other communication equipment address of maintenance, transmits this CEC message, even therefore one-way data is connected to become invalidly, also can control network system integral body.
And in the present embodiment, CEC message is transmitted from DVD player 30, but is not limit by this, also can be from television set 10 or AV amplifier 20 transmission CEC message.
Below, utilize Fig. 7, to the address management method in the present embodiment, one-way data be connected to become invalid after, one-way data connects the work become once more when effective and describes.
As shown in Figure 7, because television set 10 is connected with AV amplifier 20, therefore make HPD become effective status (making the HPD signal become high) (step 10HPD_T3) from low.
When AV amplifier 20 becomes effective status at the HPD of television set 10, read the EDID of television set 10, and the physical address " 1.0.0.0 " that obtains equipment of itself (20PA) (step 20PA_A_T2).Afterwards, AV amplifier 20 is by transmission＜Polling Message 〉, thus the logical address " Audio System " of acquisition equipment of itself (20LA) (step 20LA_A_T2).AV amplifier 20 is then made the CEC message that is transferred to this logical address and being replied.
Because the logical address (20LA) and the physical address (20PA) of the equipment of itself that in step 20PA_A_T2 and step 20LA_A_T2, obtains, consistent with the logical address (20LA) and the physical address (20PA) that keep, so AV amplifier 20 does not transmit＜Report Physical Address〉message (step 20A_R_T2).AV amplifier 20 makes HPD become effective status (making the HPD signal become high from low) (step 20HPD_T3).At this, AV amplifier 20 makes HPD unrestricted effective opportunity, for example can (obtain logical address (20LA) before) before step 20LA_A_T2.
When DVD player 30 becomes effective status at the HPD of AV amplifier 20, read the EDID of AV amplifier 20, and the physical address " 1.1.0.0 " that obtains equipment of itself (30PA) (step 30PA_A_T2).Afterwards, by DVD player 30 transmission＜Polling Message 〉, thus the logical address " DVD1 " that obtains equipment of itself (30LA) (step 30LA_A_T2).DVD player 30 is then made the CEC message that is transferred to this logical address and being replied.
Because the logical address (30LA) and the physical address (30PA) of the equipment of itself that in step 30PA_A_T2 and step 30LA_A_T2, obtains, consistent with the logical address (30LA) and the physical address (30PA) that keep, so DVD player 30 is not transmitted＜Report Physical Address〉message (step 30A_R_T2).
According to the above, address management method in the present embodiment does not have under the situation of change in logical address and physical address, by skipping the report notice of the corresponding relation of representing physical address and logical address, thereby the processing of AV amplifier 20 and DVD player 30 is simplified, simultaneously in the transmission of carrying out complicated two-way news, reduce simultaneously from the message of a plurality of equipment and transmit quantity, thereby can avoid the conflict of message and crisscross.
Below the communication equipment 100 of realizing above-mentioned functions is elaborated.
Fig. 8 is the formation exemplary plot of the related communication equipment of present embodiment.
Department of Communication Force 110 carries out the transmitting-receiving or the two-way communication of one-way data with other communication equipment.For example, no matter Department of Communication Force 110 is wired or wireless, can interface be set according to the communication mode that adapts to HDMI etc.
One-way data connection status test section 101 detect from data receiver's communication equipment output, connect the validation request or connect the ineffective treatment request.When data receiver's communication equipment becomes the state that can receive data, connect the communication equipment output of validation request from the data receiver, at this, the state that can receive data is meant, utilize one-way data to connect, data can be sent to the state of data receiver's communication equipment from the communication equipment of data receiver.And, when the communication equipment of Data Receiving side becomes the state that can not receive data, connect the communication equipment output of ineffective treatment request from the data receiver, at this, the state that can not receive data is meant, utilizes one-way data to connect the communication equipment that data can not be sent to the data receiver from the communication equipment of data receiver.For example, one-way data connection status test section 101 is in HDMI, can detect high (=connect validation request), the low (=connect ineffective treatment request) of the HPD signal that the equipment that receives TMDS (TransitionMinimized Differential Signaling: transition minimizes difference signaling) data exports, this TMDS is used to transmit image, sound and bag data.
Equipment of itself address acquisition portion 102 detects at one-way data connection status test section 101 and connects the ineffective treatment request when connecting validation request variation, obtains the equipment of itself address by network with message.For example, by EDID read out the acquisition physical address, and by transmission CEC message＜Polling Message obtain logical address.
The physical address that equipment of itself address notification transmission of messages portion 103 is obtained equipment of itself address acquisition portion 102 and the corresponding relation of logical address, the communication equipment of other that report and be notified on the network to be connected.For example, by CEC message＜Report Physical Address〉transmission notify.
Physical address and logical address that address maintaining part 104 keeps equipment of itself address acquisition portion 102 to be obtained.Physical address that obtains and logical address are stored in RAM that address maintaining part 104 has or the rewritable nonvolatile memory etc., and be connected with one-way data whether invalid state has nothing to do (not being subjected to one-way data connection status test section 101 whether to detect the influence that connects the ineffective treatment request), still can continue and keep.And, can be via transmission of messages continuation described later portion 105, the logical address and the physical address of the communication equipment notice of other that keeps equally connecting from network.
The address that transmission of messages continuation portion 105 is kept with reference to address maintaining part 104 is made when the message that has received by network to equipment of itself and being replied.Whether transmission of messages continuation portion 105 is connected with one-way data is disarmed state irrelevant (not being subjected to one-way data connection status test section 101 whether to detect the influence that connects the ineffective treatment request), utilize the logical address and the physical address of the equipment of itself that address maintaining part 104 kept to continue two-way communication, and carrying out acknowledgement messaging, described one-way data connects and is meant the connection that is used for from the data transmit-receive of data receiver's communication equipment.And, whether transmission of messages continuation portion 105 also can be connected with one-way data is disarmed state irrelevant (not being subjected to one-way data connection status test section 101 whether to detect the influence that connects the ineffective treatment request), utilize the logical address and the physical address of the equipment of itself that address maintaining part 104 kept, to other communication equipment transmission CEC message, described one-way data connects and is meant the connection that is used for from the data transmit-receive of data receiver's communication equipment.
The address notification transmission of messages is skipped portion 106 after being disabled of connection that is used for from the data transmit-receive of data receiver's communication equipment, during by validation once more, whether the physical address and the logical address of the equipment of itself that equipment of itself address acquisition portion 102 is obtained again, the physical address of the equipment of itself that is kept with address maintaining part 104 and logical address consistent comparing.The address notification transmission of messages is skipped portion 106 under the situation of comparative result unanimity, controls, thereby makes equipment of itself address notification transmission of messages portion 103 not carry out the notice of address.Skip the processing that equipment of itself address notification transmission of messages portion 103 is skipped by portion 106 by the address notification transmission of messages, thereby address distribution method is simplified.And, can avoid the conflict of message or crisscross, and high efficiency controlled function can be provided.
According to the above, communication equipment in the present embodiment keeps physical address and logical address, and, connect invalid notice even one-way data connects invalid or accepted one-way data by continuing utilization, the transmission of messages of two-way connection is proceeded.In view of the above, can obtain the control of network system integral body and the effect that interlock is in feasible state often.
And, do not have under the situation of change the simplification that address notification is become in logical address that obtains and physical address.In view of the above, can avoid the conflict of message or crisscross, and high efficiency controlled function can be provided.
The present invention goes for address management method and communication equipment, especially go for communication equipment and connect with one-way data, and message is the communication equipment that is connected on the networks such as home entertainment network with transmitted in both directions between communication equipment.And, go for being used to control the address management method of a plurality of communication equipments that connected on the networks such as home entertainment network.
Claims (4)
1. a communication equipment is connected to one-way data and connects and network, and described one-way data connects the communication equipment that is used for from data receiver and sends to the one-way data of data receiver's communication equipment, and abides by the HDMI (High Definition Multimedia Interface) standard; Described network is used for transmitted in both directions message, and abides by described HDMI (High Definition Multimedia Interface) standard, and described communication equipment is characterised in that, comprising:
The one-way data connection state detection unit, detection is from the request of connection validation and the request of connection ineffective treatment of described data receiver's communication equipment output, the request of described connection validation is represented, utilize described one-way data to connect, can send data to described data receiver's communication equipment, the request of described connection ineffective treatment is represented, utilizes described one-way data to connect, and cannot send data to described data receiver's communication equipment;
The equipment of itself address obtains the unit, detecting from the request of described connection ineffective treatment when described connection validation request changes, by described network, obtains the equipment of itself address with message;
The address holding unit keeps described equipment of itself address; And
Transmission of messages continues the unit, no matter whether the request of described connection ineffective treatment is detected, all reply making by the message of described network reception the described equipment of itself address that is kept according to described address holding unit.
2. communication equipment as claimed in claim 1 is characterized in that,
Described communication equipment further comprises:
Equipment of itself address notification message transmission unit by message, is given described equipment of itself address notification other the communication equipment that is connected on the described network;
Comparing unit obtains whether consistent comparing of described equipment of itself address that described equipment of itself address that the unit obtained and described address holding unit kept to described equipment of itself address; And
The address notification transmission of messages is skipped the unit, controls under the situation according to the comparative result unanimity of described comparing unit, so that described equipment of itself address notification message transmission unit is not carried out the notice of described equipment of itself address.
3. communication equipment as claimed in claim 1 or 2 is characterized in that,
The address of other communication equipment that is connected on the described network of the further maintenance of described address holding unit;
No matter whether the request of described connection ineffective treatment be detected, described transmission of messages continues the unit and all utilizes transmission that the address of described equipment of itself address and described other communication equipment carries out message and reply.
4. the address management method of a communication equipment, this communication equipment is connected to one-way data and connects and network, described one-way data connects the communication equipment that is used for from data receiver and sends to the one-way data of data receiver's communication equipment, and abides by the HDMI (High Definition Multimedia Interface) standard; Described network is used for transmitted in both directions message, and abides by described HDMI (High Definition Multimedia Interface) standard, and described address management method is characterised in that, comprising:
The one-way data connection status detects step, detection is from the request of connection validation and the request of connection ineffective treatment of described data receiver's communication equipment output, the request of described connection validation is represented, utilize described one-way data to connect, can send data to described data receiver's communication equipment, the request of described connection ineffective treatment is represented, utilizes described one-way data to connect, and cannot send data to described data receiver's communication equipment;
The equipment of itself address obtains step, detecting from the request of described connection ineffective treatment when described connection validation request changes, obtains the equipment of itself address; And
Whether transmission of messages continues step, be detected no matter be used for the described connection ineffective treatment request that the data of described data receiver's communication equipment send, and all according to the described equipment of itself address that is kept, the message that receives by described network is made reply.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP373295/2005 | 2005-12-26 | ||
| JP2005373295 | 2005-12-26 | ||
| PCT/JP2006/324205 WO2007074611A1 (en) | 2005-12-26 | 2006-12-05 | Address managing method and communication device |
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| CN101346936A CN101346936A (en) | 2009-01-14 |
| CN101346936B true CN101346936B (en) | 2011-02-09 |
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| CN2006800490856A Expired - Fee Related CN101346936B (en) | 2005-12-26 | 2006-12-05 | Address managing method and communication device |
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| US (1) | US7949762B2 (en) |
| EP (1) | EP1968239B1 (en) |
| CN (1) | CN101346936B (en) |
| WO (1) | WO2007074611A1 (en) |
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Also Published As
| Publication number | Publication date |
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| WO2007074611A1 (en) | 2007-07-05 |
| EP1968239A1 (en) | 2008-09-10 |
| US20090157885A1 (en) | 2009-06-18 |
| EP1968239A4 (en) | 2013-03-13 |
| CN101346936A (en) | 2009-01-14 |
| US7949762B2 (en) | 2011-05-24 |
| EP1968239B1 (en) | 2019-01-30 |
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